I have tried all the other apps mentioned in this post and the one I like most is Penultimate.
It is limited. No handwriting recognition and no fancy zooming (I like Notability's zoom features). But for basic note-taking, it is still my favorite. It just seems the smoothest writing experience - and, at the end of the day, that's what counts.

Thanks for your input. About Penultimate, for some reason I haven't bought it yet, even though I have bought almost all the others. I guess I'm not very impressed by the screen shots I saw on the app store, and for me looks matter (hey, I'm an aPple user ). But I suppose I should give it a try.

I had a look at that stylus, the tip has a different material that seems to glide better on the screen, that sounds very interesting. Have you used a Wacom Bamboo, how do they compare? On the other hand the Trent stylus looks really short, that might be a problem.